Specialist Reactor Physicist
Confirmed on the employer's own hiring board on Oct 20, 2026. First seen by Alion on Apr 27, 2026. AtkinsRéalis scores A on the Alion truth index.
Job Description
Overview
We are currently looking for a Specialist Reactor Physicist to be part of our teamin the Fuel and Physics department supporting the design of new nuclear power plants and the operation, refurbishment, or waste management and decommissioning of existing CANDU nuclear power plants.
Please note that this job posting is intended for you to express your interest in future opportunities within AtkinsRéalis
Your role
Perform and/or supervise the following calculations: Finite-reactor-core calculations, Kinetics calculations, Transport calculations, Advanced-fuel-cycle calculations, Monte Carlo calculations.
Prepare inputs, run reactor physics computer codes.
Develop, adapt and modify FORTRAN computer codes as required for specific applications (e.g., to implement new methods or perform new types of calculations for both diffusion and transport calculations).
Develop codes and methodologies and perform reactor physics analyses to support design and commercial activities.
Document analyses in technical notes and reports, and present results at meetings.
Interface with other groups/projects as required.
Review technical documents.
Supervise, train and prepare training material for junior staff.
Estimate, monitor schedules and assign work to meet completion dates.
Interface with clients and projects to assess reactor physics related issues confronting their projects/stations and advising on potential solutions.
Prepare and/or review work proposals for internal and external clients.
Perform varied work assignments effectively and respond quickly to changing project needs.
Establish required resources for client work.
Propose/develop methodologies and approaches to be used in reactor physics tasks.
Develop analysis basis plans.
Lead work and liaise with a multidisciplinary analysis team including project management.
About you
Master’s or Ph.D. degree or equivalent in Nuclear Engineering, or Science, from a university of recognized standing
15+ years of relevant experience or 10 years of experience with an advanced degree.
Extensive experience with reactor physics codes WIMS, DRAGON, RFSP and MCNP. Experience with DONJON and KENO computer codes.
Experience with nuclear data library creation
Experience with few energy group constants
Knowledge of light water reactors, and small modular reactors is desirable
Must be conversant with computer environments.
Proficiency in both Linux and WINDOWS environments.
Ability to program especially in python, MATLAB, C++, or Fortran and familiarity with the Linux and Windows operating system.
Reward & benefits
Explore the rewards and benefits that help you thrive - at every stage of your life and your career at AtkinsRéalis in Canada.
Enjoy competitive compensation, employee recognition, and a brilliant range of flexible benefits you can tailor to your health, wellbeing, financial and lifestyle needs.
Make the most of diverse opportunities for training and professional development to grow your skills and expertise.
And take advantage of our hybrid working culture and generous time-off policies to balance a fulfilling career with your personal life.
About AtkinsRéalis
We're AtkinsRéalis, a world-class engineering services and nuclear organization. We connect people, data and technology to transform the world's infrastructure and energy systems. Together, with our industry partners and clients, and our global team of consultants, designers, engineers and project managers, we can change the world. We're committed to leading our clients across our various end markets to engineer a better future for our planet and its people.
Additional information
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Appropriate accommodation will be provided upon request throughout the recruitment and hiring process as required by Company policy and the Accessibility for Ontarians with Disabilities Act (AODA).
Successful applicants will be notified about AtkinsRéalis’ accommodation policies at the time the employment offer is extended, and the information will be shared with new personnel during the onboarding process.
Worker Type
EmployeeJob Type
RegularAt AtkinsRéalis, we seek to hire individuals with diverse characteristics, backgrounds and perspectives. We strongly believe that world-class talent makes no distinctions based on gender, ethnic or national origin, sexual identity and orientation, age, religion or disability, but enriches itself through these differences.